All tests run on an 8-year-old MacBook Air.

Android Studio's logcat is fine. But opening a full IDE just to read logs and debug an error felt like overkill.

I built a lightweight logcat viewer in Rust + Tauri. Then I added a Gemini button next to every error line. One click — AI diagnosis, no copy-pasting, no context switching.

Here's how the AI integration works.

The idea: click the error, get the diagnosis

Every error line in the viewer has a small button. Click it, and the app:

Pulls that error line plus the surrounding 50–100 lines from a ring buffer

Strips any PII (IP addresses, emails) before sending

Sends the context to Gemini with a carefully crafted prompt

Displays the diagnosis in an overlay panel

No manual copy-pasting. No switching to a browser. The diagnosis appears where the error is.

The ring buffer design

Logcat streams thousands of lines per minute. You can't keep all of them in memory.

The Rust backend maintains a ring buffer of the last 2,000 lines.…